Dogs in streets going mad (7)
I believe the answer is:
setters
'dogs' is the definition.
(setter is a kind of dog)
'streets going mad' is the wordplay.
'going mad' indicates an anagram.
'streets' with letters rearranged gives 'SETTERS'.
'in' is the link.
(Other definitions for setters that I've seen before include "They are expected to point" , "Crossword compilers" , "Long-haired gun dogs" , "eg Scottish, Gordon and 18" , "Canine" .)